Year 9 oxidation and reduction RGSHW

Last updated 11 months ago

3 questions

Note from the author:

Worksheet of oxidataion and reduction in terms of gain or loss of oxygen

C1.18b Oxidation and reduction

For Year 9 oxidation means the gain of oxygen and reduction means the loss of oxygen.

(We will use more advanced definitions in Year 10 and beyond).

In each of the following reactions, decide whether the substance shown in bold is oxidised or reduced.
1 aluminium oxide → aluminium + oxygen __________

2 nickel + oxygen → nickel oxide __________

3 carbon + zinc oxide → carbon dioxide + zinc __________

4 iron oxide + hydrogen → iron + water __________

5 aluminium + chromium oxide → aluminium oxide + chromium __________

6 aluminium + oxygen → aluminium oxide __________

7 hydrogen + copper oxide → copper + water __________

8 calcium oxide → calcium + oxygen __________

9 tungsten oxide + hydrogen → tungsten + water __________

10 magnesium + iron oxide → magnesium oxide + iron __________

Now copy the equations into your notes with the following key.

Underline for oxidation

Box for reduction.

C1.18b Oxidation and reduction

In each of the following reactions, decide whether the substance shown in bold is oxidised or reduced.
1 aluminium oxide → aluminium + oxygen ____________

2 nickel + oxygen → nickel oxide _____________

3 carbon + zinc oxide → carbon dioxide + zinc ____________

4 iron oxide + hydrogen → iron + water ____________

5 aluminium + chromium oxide → aluminium oxide + chromium ____________

6 aluminium + oxygen → aluminium oxide _____________

7 hydrogen + copper oxide → copper + water ____________

8 calcium oxide → calcium + oxygen ____________

9 tungsten oxide + hydrogen → tungsten + water ____________

10 magnesium + iron oxide → magnesium oxide + iron ____________

Now copy the equations into your notes with the following key.

Underline for oxidation

Box for reduction.

Other Answer Choices:

oxidised

reduced

C1.18b Oxidation and reduction

1 aluminium oxide → aluminium + oxygen 
The aluminium oxide has had oxygen removed and has therefore been _______ 
2 nickel + oxygen → nickel oxide
The nickel has gained oxygen and has therefore been _______ 
3 carbon + zinc oxide → carbon dioxide + zinc

The zinc has had oxygen _______ and has therefore been reduced
4 aluminium + oxygen → aluminium oxide

The aluminium has _______ oxygen and has therefore been oxidised.